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SubjectRe: * 4 converted to << 2 for networking code
   Date: 	Wed, 10 Jan 2001 17:48:59 +0100
From: antirez <antirez@invece.org>

The attached patch converts many occurences of '* 4' in the
networking code (often used to convert in bytes the TCP data offset
and the IP header len) to the faster '<< 2'.

The compiler does this for you, check the assembler it outputs.

Later,
David S. Miller
davem@redhat.com
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